I was trying to start a Postfix mail server on a Ubuntu 12.4:
What? I just started the service and it should be running on port 25 but telnet won't connect, so I had to dig more:
Nothing?! After some Google search, I located the log file at
No Permission? Ok, let's give it the permission:
Great, it worked!
chown postfix.postfix =
chown postfix:postfix =